Molding apparatus.



No. 868,607. 'PATENTED 00T.15,-1907. F. x. LEUTHNER.

MOLDING APPARATUS. APPLIOATIOH Hum um. 12. mm.

2 SHEETSSHEET 1.

PATENTED OCT- 15, 1907.

I; X LB'UTHNER. MOLDING APPARATUS. APPLIUATIOH nunun. 12. 1901.

2 sums-$112M 2.

I 0 0 0 0 0 0 0 0 0 0 0 0 0 0 o O UNITED STATES PATENT OFFICE.

FRANK LEUTHNER, OF BUFFALO, NEW YORK, ASSIGNOR OF ONE-HALF TO FRANKTICKNER, OF HAMBURG, NEW YORK.

MoLn'rNe APPARATUS.

Specification of Letters liatent.

Patented Oct. 15, 1907.

Application filed January 12, 1907. Serial No. 351,909.

of the United States, and a resident of Buffalo, in the county of Ericand-State of New York, 'have invented certain new and usefulImprovements in Molding Apparatus; and I do hereby declare that thefollowing. is a full, clear, and exact description thereof, referencebeing bad to the accompanying drawings, and to the letters of referencemarked thereon, which form apart of this specification.

This invention relates to improvements in molding apparatus for makingtubular castings, of thatkind embracing a collapsible core-barrel and itconsists in the matters hereinafter set forth and pointed out in theappended claims. 4

The apparatus embodying my invention which is illustrated in theaccompanying drawings, embraces as its main feature a mold embracingexternal and internal mold members. The external mold member consists ofan open ended tubular part or flask which rests on a horizontalsupporting surface or drag and to the inner surface of which is appliedthe layer of sand which constitutes with the flask the outer part of themold when the same .is in readiness for use. The internal mold memberconsists of a collapsible hollow metal core-barrel, which also rests onthe said horizontal surface or drag and to which is applied'the layer ofsand to form the inner part of the completed mold, Said core-barrclembraces a hollow or tubular tapered body or core, and a plurality ofseparate, perforated, longitudinally arranged plates which surround thesaid body or core, the said body or core being adapted for e ndwisesliding movement relatively to the plates, so that the said plates maybe allowed to move inwardly and the core-barrel thereby collapsed topermit its extraction from the finished casting. in connection with theparts above referred to, a device is shown in said drawings for movingthe body or core of the corebarrel in adirection to effect the collapseof the external plates thereof, embracing levers adapted to act on theflask and the said body of the pore barrel in a manner to lift the flaskfrom the drag and at the same time to press downwardly on the said bodyof the core barrel so that the said core or tapered body of thecorebarrel is thrust downward within the exterior plates thereof and thecore-barrel is -thereby collapsed at the same time that the flask islifted; said levers being operated by suitably applied hoistingorlifting means, such as a crane.

My invention may .be more readily understood by reference to theaccompanying drawings in which Figure 1 is a View showing the mold invertical section, taken on line ll of Fig. 2, and in elevation, anextractor for use in connection with the core-barrel.

Fig. 2 is a horizontal section of the mold, taken on line 22 of Fig. 1.Fig. 3 is a View in perspective showing my improved core-barrelassembled. Fig. 4 is a view in perspective showing the tubular body ofsaid core-barrel. Fig. dis a perspective view of one of the detachableside plates thereof. Fig. 6 is a perspective view of the head of saidextractor. Fig. 7 is a perspective view, of one of the side plates ofsaid corebarrel, showing a modified form thereof. Fig. 8 is aperspective view of an annular frame for use in connection Withsideplates of such modified form. Fig. 9 is a detail section showing thepivotal connection of the side plate illustrated in Fig; 7 with theannular frame shown in Fig. 8.

I As shown in said drawings, A indicates the tubular core or body of thecore-barrel, which is of tapered form, taperingupwardly from the bottomto the top thereof,

. Said body A is preferably made of cast-metal, and may be eitherrectangular, round or of any other suitable shape in cross-section. issquare in cross-section. At its bottom said body has an outwardlyprojecting flange a, as most clearly shown in Figs. 1, 3 and 4. On theouter margins of said flange are elevated ribs or flanges a a extendingat their ends to within a short distance of the corners of said flange.

B B indicate side plates which surround the body A and, when the saidbody has a plurality of flat faces,

is herein illustrated, said body are fiat and severally applied to thesaid flat faces. The

flange a is adapted to engage the lower edges of the side plates B,which are held in place upon said flange by the ribs (1 a. Said plates Bconform to the general contour of the exterior lateral surfaces of thebodyA, but they are of such width that when placed in position upon saidbody, the plates are separated a small distance from each other at theiradjacent margins. Upon the inside faces of each'plate B are twolongitudinal ribs b b arranged respectively parallel with and near theoblique side edges of said plate. Said ribs are adapted to engagesimilar ribs 0. a formed fiat upon the faces of the bodyA near the sideedges of said faces. The said ribs b b and a it serve to hold the sideplates at a distance from the body so as to leave an air spacetherebetween. When in place, the side plates are held firmly in placeupon the body by means of encircling metal bands or hoops C.- At the topof the body is formed a neck D, which projects above the upper ends ofthe side plates B when the latter are in position on the body. Said neckis shown as made integral with the said body A and of tubular andcylindric form.

the core-barrel from the mold, as will be explained hereinafter, andalso furnishes means for connecting a hoisting device therewith inhandling the body, for which purpose it is provided with a horizontal,hole d adapted In preparing the mold for use, the parts of the corebarrel are assembled. with the side plates B upon' the body'A, heldin-place by the bands 0, as shown in Fig.

I 1 and molding sand is applied to the exterior surface of thecore-barrel thus assembled, in the usual manner. The holes b' aid inholding the sand uponthe plates. The complete .core isthen placed uponthe bottom plate or drag E and about itis placed the flask .F with itssand layer or lining, leaving an annular space G (Figs. 1 and 2)betweenthe core and the lining of said flask. Said flask is of commonform and is provided with a horizontal flange around the top edge. Themolten metal isipoured into said annular space as in I the ordinaryoperation of casting. When the casting is poured, the holes b and a, theair space between the side plates 13 and the frame A, and the hollowinterior of said frame all facilitate the escape of gases generated bythe molten metal and thereby improve the quality of the casting.

For removing the tubular casting from the mold, an

I extractor, shown in Fig. 1, is employed. .Said extractor comprises ahead H consisting offour radial members joined integrally at the centerof the head and extending radially-from the vertical axis thereof in theform-of lateralwings h h. The lower edges of the said wings are adaptedto engage the top-edge oi the neck -D, and

said-wings are notched or cut away to form at theirjouter endsdownwardly projecting prongswhich extend outside'of the neck IX-therebyforming in the bottom. surface of the head acentral recess which.receives the top of the neck and holds the head centrally in position Iover the same.- To the upper part 'of said-head are secured twohorizontally disposed fiat bars h h. To theouter ends of these barsarepivoted the inner ends of two.

levers I I of equal length which extend outwardly from the head H. Asshown, saidlevers are'disposedwith I their inner ends between the twovbars h h. They are 'core barrel and the hooks Z Z are caught under theoutpivoted to the ends of said bars by means of horizontal pivot pins h'k To the outer ends of said levers are I fastened the lower ends of twochains J J of equal length, l

the upper ends of which are connected with a ring K. Said ring K mayconstitute part of any ordinary hoisting apparatus, such'as a crane orthe like. At points on said levers near their inner ends are secured twodepending chains L' L of equal ilength, which are provided at theirlower ends with, hooks l l. l

. The flask Fis provided at its top with an outwardly extending,horizontal flange f. In the use of the extractor it is placed with itshead resting upon the neck D of the wardly extending top flange f of theflask F or otherwise engaged with the flask. Lifting-force is thenapplied to the outer ends of the levers I I by means of the ring K andchains .I which forces the head H and the core-barrel downward and atthe same time raises the flask and 'contained casting from the bottomplate or drag. In the upward movement of the flask the side plates B ofcore-barrel slide upward upon the side faces of the tapered body A and,since said body is tapered upwardly and said side plates do not meeteachother along their oblique edges, they are-thereby allowed to moveupwardso that they, with the sand covering of the core: barrel, are nolonger internally supported andmay be come collapsed and thereby freedfrom the inner surfaoe of'the casting. When the body A has been lifted adistangie equal to the length of the neck D, the further up yard pul ponthe outer ends of the lovers I I and consequ'ent downward movement ofthe head H brings the wings h into engagement with the side plates B andthe frame and side plates are then pushed downwardly together and thesaid plates and the said covering disengaged from the casting. Thus theact of lifting the flask and casting from the bottom plate or'dragoperates also to extract thecore-barrel from the; casting and obviatesthe necessity of employing any other. means for'this purpose. A 9 show amodified form of construction Figs 7, 8'and in the core-barrel. 'In thiscasef the side plates B,instead of resting directly upon the bottomflange aof the frame A, are hinged at their bottom edges to an annuframe consists of a vertical and a horizontal annular,

flange joined integrally along the lower edge of the former and theinner edge of the latter; Disposed upon the peripheryof said frame intlie angular space between said' flanges are a number of horizontallypierced lugs p and upon the'bottom edge .of each side plate are locatedsimilar lugs b adapted to enter betweenpa'irs of the lugs p upon saidannular frame. The plates are pivotally attached tothe annular frame bypivot pins theannu-lar frame rests. upon the bottom flange or of theribs a. i It will be seen that this driving or hammering is necessaryfor extracting-it, and better casting's are secured, due to .thevent-holes and air-spaces which ins'ure better drying of the moldingsand and also facilitate the escape of'ga-ses duringthe operation ofcasting.

I elai'm as my invention:

12' A core-barrel comprising a tapered body and aplurality of platessurrounding and adapted for. endwise movement relative to said body saidplates being perforated' and adapted to receive and hold a coating ofsand.

2. A core-barrel'comprislng a tapered, tubular body and a plurality ofplates surroundingsaid body and adapted for endwise movement relativethereto, said/plates being supported at a distance from the outenface ofsaid body so as to leave air spaces betweenthe walls of said body andthe plates. 7

3. A core barrel comprising a tapered-body providedat its larger endwith an outwardly extending flange, and'a plurality of perforated platessurrounding said body'an'd p 10 inserted through the holes in the lugs pandb and construction possesses advai tages over, constructionsheretofore employed in thatthe core-barrel can be easily and quicklyextracted by a simple and inexpensive form of extractor. Furthermore,'tl1e life of the'core-barrel is prolonge d since. no

beariug at their ends against said flange, said plates being adapted forendwise movement relative to the body in a direction away from saidflange, and being adapted to receive and hold a coating of sand. u

4-. A core barrel. comprising a tapered body and. a. plural- -such widththat when applied to the body, longitudinal permitting movement of theplates toward each other when the taper-rd body is removed from withinthe same,

and being adapted "to receive and hold a coating of sand.

5. A core-barrel comprising a tapered body and a plurality of platessurrounding and adapted to slide endwise on saidzbody, said plates beingprovided upontheir inner with longitudinal, inwardly extending ribs. and

extending ribs forming bearing surfaces for the ribs on I the plates.

6. A core barrel comprising a tapered body provided at its larger endwith an outwardly extending flange and a plurality of peri'orated platessurrounding said body with longitudinal spaces between their sidemargins and bearing at their ends against said flange, and a bandsurround big the plates to hold them in place on the body, said platesbeing adapted for endwise movement relative to said body in a directionaway from said flange, and being adapted toreceive and hold a coating ofsand.

7., A core-barrel comprising a tapered body provided with a flange atits larger end, an annular frame adapted to surround ,the body incontact with said flange, and a plurality of plates which surround saidbody and. are hinged to said annular frame.

8. A core-'barrci comprising atapered body provided at its larger endwith an outwardly extending flange and a plurality of perforated platessurrounding said body and hearing at their ends against said flange,said plates being adapted for endwise movement relative to the body in adirection away from said flange and being ofsubstantially the samelengtlras the body and said body having at its smaller end a neck'whichextends beyond the adjacent 'ends of said plates when the oppositeendsthereof are -ln contact with said flange.

9. The combination with a collapsible core-barrel adapted to becollapsed by downward pressure on its upperend, and a flask adapted tosurround said core-barrel, of an extractor comprising a head adapted torest upon the top of the co r'e'barrel and means connected with the headand adaptedfor attachment to, said flask, for exerting simultaneously anupward pull on the flask and a downward pressure on the core-barrel.

10. 'ihecombination "with a collapsible corebarrel, embracing a taperedbody and a plurality of plates surrounding and adapted for endwlsemovement relatively to said body; said barrel, being adapted to becollapsed by downward pressure-on the said body,'of a flash adapted. tosurround said coreharrel and an extractor embracing a head adapted toengage the top" of the body, and means connected with said head andadapted for attachment to the flask, said means being constructed toexert simultaneously an upward pull on the flask and a downward pressureon the said head.

11. The combination with a collapsible core-barrel adapt ed to hecollapsed by downward pressure on-its upper end and a flask adapted tosurround said core oarrel, of an extractor comprising a head, leverspivoted to said head and extending outwardly therefrom, lifting membersattached to the outer ends oi. said levers and depending membersconnected with said levers near their inner ends, and adapted forattachment to saidfiask.

12. The combination with acollapsible core-barrel, embracing a taperedbody and a plurality of plates surround ing and adapted for endwi semovement relative to said body said barrel being" adapted to becollapsed by downward pressure on said bodyof a flask adapted tosurround said core-barrel and an extractor embracing a head adapted toengage the top of said body, leverspivoted to the said head andextending outwardly therefrom, lifting members connected with the outerends of said levers, and depend ing members connected with said leversnear their inner ends'and adapted for connection with said flask.

13. The combination with a collapsible core-barrel, embracing a taperedbody having 'an endwisc extending neck at its smaller end, and aplurality of plates surrounding and adapted for endwise movementrelative to said body, of a flask adapted to surround said core-barreland an extractor-comprising a head provided with a recess on its bottomsurface to receive the top of said neck, and means connected with saidhead and adapted for attachment to the flask for exerting simultaneouslyan upward pull on the flask and a downward pressure on the head.

14., The combination with a collapsible core-barrel e'znbracing atapered body having an en'dwiseextending neck atits smaller end. and aplurality of plates surrounding and adapted for endwise movementrelative to said body,

'of a flask adapted to surround said core-barrel, and an FRANK X.LEUTHNER.

Witnesses Ghoron C. Sour/r,

R. S Bnnxmcsno'rz.

